UNIONS TO SUE OVER SUNRAIL: The Brotherhood of Railroad Signalmen and the Florida AFL-CIO will hold a news conference to announce a lawsuit against the Florida Department of Transportation about the SunRail commuter-rail system in central Florida. The lawsuit is expected to allege that DOT did not uphold an agreement related to signal maintenance and construction work. (10 a.m., Florida Press Center, 336 East College Ave., Tallahassee.)